Dry gas meter



Sept. 20, 1927. 42 899 s. SIMPSON DRY GAS METER Filed Oct. 20, 1 925 '2 Sheets-Sheet 1 m D I" Iuveni'ol! by (,J-LM:

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Sept. 20,1927. s SIMPSON 1,642,899

mu; GA'S METER File d Oct. 20, 1925 2 Sheets-Sheet 2 Inventor k Fig.5. KJ

Patented Sept. 20, 1927.

PATENT orries.

s'rnrn n SIMPSON, or Nn 'ron ABBQT, nnennnn.

DRY ens iun'rna.

Application filed October 20, 1923, Serial No. 669,779, and in Great Britain November 22, 1922.

This invention relates to dry gas meters and has for its object to provide an improved arrangement of the gas passages to and from the valves of the meter.

In dry gas meters the gas passages to and from the valves are usually fixed below the valve plate which causes some of the passages to be restricted in area and difficult to repair.

According to the invention the .gas passages are provided on the upper surface of the valve plate, and I prefer to arrange the upper part of the flag wires together with the' leve'rs and connecting links actuating the valve crank spindle, at the same side of the meter as the valves, and to enclose them in the valve chamber, a spindle being carried from thischamber through a stuffing box, to actuate the index and prepayment mechanism of the meter;

'The invention comprises the features hereinafter described.

A construction of gasmeter according to the invention is illustrated, by way of example, in the accompanying diagrammatic drawings. j

Figure 1 is a plan view ofthe meter, the top cover plate being removed.

Figure 2 is a sectional elevation of the valve plate taken on the line B in Figure-I. I

Figure 3 is a sectional elevationof the valve plate taken on theline D of Figure 1.

Figure 4 plate. Figure 5 is a composite transverse crosssectional elevation of the upper part of the meter;

'In carrying the invention into effect as illustrated in the accompanying drawings, the valve plate a fittedwithin the meter is an underside view of the valve casing is provided upon the upper surface with ajfitting 1) serving to form a passage extending from the outlet pipe 0 of'the meter to the outlet ports of the two slide valve gratings (Z, e. For this purpose the fitting Z) is provided of substantially Y shape, advantageously of sheet metal, the edges being turneddownwardly all round the fitting,'with the exjception of the part joining the outlet pipe 0, to form the walls ofthe outletpassage. jllhe limbs 6 b are, however, cut away or recessed in the outer walls and partly across the width for the formation of ports 6, Z respectively which register with the lower ends of the outlet ports (5, 6 respectively of the valve gratings (Z, c. v

The valve gratings (1,-0, are advantageously formed as castings having-three ports, the outlet ports (l e beingthc middle ports, and are provided to fit upon the limbs 6 5 of the outlet fitting b. The walls of the outer ports d 6 that is to say, the ports most distant from the crank spindle operating the valves, a'i'e, h0Wever,

extended downwardly to be received'in Corresponding openings 'formedin the valve platen, while the outer walls ofthe Oppositel v disposed port d c are cut away towards the lower end to afford communica- 'tion between the raid ports 03 ,6? and fittingsg i'espoctivel y forming passages connectingwith the said ports. The fitting; 180011- veinently formed as a strip of sheet metal having the endsturneddownito form lat eral walls of such height that when thefit wardsthe other end the outer lateral wall serves also as a closing wall to the fitting f. The fittings 6, f and 9 together with the valve gratings d, e are soldered or otherwise secured together and to the valve plate'a.

The outer port d of the valve grating d communicates with the'corresponding diaphragm h by way of a passage formed by a corresponding fitting 2' applied to the un der' surface of the valve" plate and, connected to the diaphragm by the conduit 6 The inner port (Z communicates with the chamber 7& enclosing the diaphragm h' by way of the fitting and a port (L1 formed in the valve plate. The outer port 0 of the valve grating .e communicates directly with the chamber 17" enclosing the diaphragm "disposed on the opposite side of the partition 70 to that carrying the diaphragm h, while the inner port 6 communicates by way of the fitting g and a port 0, formed in'the valve plate with the diaphragm 'j, the port a being connected to the 'diaphragm bya conduit Z. In the construction hereinafter described it will be understood that the ports (Z d d, and e 6 e in the respective valve gratings open at different levels.

In the construction illustrated the flag wiresm are disposed at the outer ends of the valve gratings d, e and thus the upper parts thereof together with the-levers m and connecting links m by which the valve crank spindle a is operated may be enclosed with the valves 0, p in the valve chamber ,7, the spindle r for actuating the index mechanism being carried through a stuffing box 7'.

The inlet pipe 8 of the meter is connected with the valve chamber 9 by means of a passage formed by a fittingt applied upon the upper surface of the valve plate a.

It will be understood that the invention is not limited to the details of construction hereinbefore described. Thus, the flag wires are not necessarily disposed at the same side of the meter as the valves. They may, if de sired, be disposed at the opposite end of the valvesor towards the opposite end of the meter and the two inside ports of the valve gratings be accordingly connected to the diaphragms. Again, the upper parts of the flag wires, the levers, and links connected therewith, the upper part of the valve crank spindle and the spindle acting the index 7 mechanism may 'be situated without the valve chamber.

I claim: I 1. In a dry gas meter, a casing, a valve plate disposed within said casing and provided with ports, an inlet fitting within said casing and opening therein above said valve plate, an outlet fitting upon said valve plate forming an outlet passage and having ports therein above said valve plate, valve gratings disposed above said valve plate and provided with ports opening at different levels, one of which ports in each valve grating communicates with a port in the outlet fitting and other of which ports communicate with the ports in the valve plate, and valves slidably fitting upon said valve grating.

2. In a dry gas meter, a casing, a valve plate disposed within said casiugand provided with ports, an inlet fitting within said casing and opening therein above said valve plate, an outlet fit-ting upon said valve plate forming an outlet passage and having port's therein above said valve plate, valvegratings disposed above said valve plate and having ports opening, at different levels, one of which ports in each valve grating communicates'with a port in the outlet fitting, an-

other of which ports directly communicates with a corresponding port in the valve plate, While the remaining ports of the valve gratings indirectly communicate with ports in the valve plate, fittings upon the valve plate forming connecting passages between the said ports in the valve plate and the respective ports in the valve gratings which indirectly communicate therewith, and valves slidably fitting upon the said valve gratings.

3. In a dry meter, a casing, a valve plate disposed within said casing and having ports therein, a partition upon said valve plate extending between two sides of said casing and forming a valve chamber, an inlet fitting to the'said valve chamber for gas, an outlet fitting in said valve chamber upon said valve plate, valve gratings disposed upon said valve plate andwithin said valve chamber and having ports opening at different levels and communicating respectively with the outlet fitting and with the ports in the said valve plate, and valves slidably fitting upon the said valve grating 4. In a dry gas meter, a casing, a valve plate disposed within sald caslngand provided with ports, a partition upon'said valve plate forming a valve chamber, an inlet fitting upon the said valve plate for admisposed above'said valve plate and provided with ports opening at different levels and communicating respectively with the ports in the valve plate, ports in the outlet passage fitting and ports in the connecting passage fitting, and valves slidably fitting upon the said valve gratings.

5. In a dry gas meter, a casing, a valve plate disposed within said casing and provided with ports, a partition upon said valve plate forming a'valve chamber, an inlet fitting upon the said valve plate for admission of gas to the said valve chamber, fittings upon the said valve plate in the said valve chamber forming outlet and connecting passages and having ports, valve gratings disposed above said valve plate and provided with ports openiirg at different levels and communicating respectively with ports in the valve plate, ports in the outlet fitting and ports in the connecting passage fittings, valves slidably fitting upon the said valve gratings, diaphragms below the valve plate 'communicating'with certain of the ports,

flag wires extending through the valve plate I into the said valve chamber. a vertically disposed crank spindle in said valve chamber,

lever arms upon said flag wires, connecting links connectingsaid lever arms with said crank spindle, and links connecting said. crank spindle with said valves.

STEPHEN sIMPso 

